[XML] Extensible Markup Language (XML) 1.0
The definition of XML
http://www.w3.org/TR/1998/REC-xml-19980210\
[XML-MIME] XML Media Types
The definitive listing of all MIME types
http://www.ietf.org/rfc/rfc2376.txt
Microsoft's MSDN XML Developer's Center
The starting point for all things related to Microsoft XML
http://msdn.microsoft.com/xml/default.asp